Re: Downstream SNR Target - Reset to 6dB please

I may be wrong but it's not possible on Fibre to change the target margin manually via the ISP as you can if you were on ADSL(2). Basically the DLM (automated system) will take care of line margins and if "it" thinks it's safe to reduce it then it will do so, if it's not then "it" will increase it.

An engineer can also do this but usually only to clear a fault.

If your connection is unstable perhaps check to see if there are no faults on your voice side i.e no crackles, hiss, etc and if there aren't any then go through the faults procedure to see if it picks anything up.

Re: Downstream SNR Target - Reset to 6dB please

4.4dB should be fine, in fact there is slow rollout from BT in that if your line can support 3dB then it'll run at that speed.

Again it's up to the DLM systems in place, if it thinks it's unstable i.e too many errors or frequent drop outs it'll try adding interleaving to the line & / or increasing the SNRm back towards 6dB or higher.

This DLM process is constantly on (unless it gets stuck, which is fairly rare) and your line will adjust over a period of weeks unless there is a sudden fault.

So if there is no fault on your line or with your equipment then suffer the stability problems for a couple of days whilst the DLM is doing it's thing and it'll go back to being stable without you noticing it.